Error code 8015D002 occurs when you try to sign in to Xbox Live

Problem

You see the following error code and message when you try to sign in to Xbox Live:
Account does not exist.
Status Code: 8015D002

This may mean there’s a problem with your account. For example, the security information for your account may need to be updated.

Solutions

Solution 1: Did you recently sign up for two-step verification?

If you recently turned on two-step verification, you may not know how to sign in to apps or devices that don't accept security codes. Some apps (like the mail apps on some smartphones) and devices (like the Xbox 360) can't prompt you to enter a security proof when you try to sign in. If you get an incorrect-password error with an app or device, you'll need to create a unique app password to sign in. After you sign in with your app password, you're all set to use that app or device. You’ll use this new app password to sign in to your device instead of using your Microsoft account password.

You'll need to create and sign in with an app password once for each app or device that can't prompt you for a security proof.